PSP Broadband connectivity problems

I've got a PSP and play online games with this. My connection when I'm playing games like Socom for instance keeps lagging. I've tried different routers to rule that out and have sat right next to it and this doesn't make any difference.

My usage indicates that it is gonig in the right direction, but how do I know if its getting priority, especially after 4pm?

Any one know how I can get a better PSP connection without the lag? It doesn't seem to matter what time of day, it just lags, sometimes a little, sometimes lots.